The 1992 GEO Storm with an in-line 4-cylinder engine from Toyota/Isuzu may experience overheating due to issues with the cooling system, such as a failing radiator, water pump, or thermostat.

This vehicle may develop oil leaks from the valve cover gasket, oil pan gasket, or other seals and gaskets that degrade over time.

The in-line 4-cylinder engine may have issues with the timing belt, such as wear or breaking, which can lead to significant engine damage if not replaced at recommended intervals.

Fuel injectors or fuel pumps may fail or become clogged, leading to poor engine performance or stalling.

Problems with the ignition system, such as faulty spark plugs, ignition coils, or the distributor, can cause misfires, rough idling, or difficulty starting the engine.

Exhaust manifold or exhaust system leaks can lead to increased engine noise, poor fuel economy, and potentially harmful exhaust fumes entering the cabin.

Vacuum leaks from hoses or gaskets can cause erratic idling, poor acceleration, and decreased fuel efficiency.

Sensors such as the oxygen sensor, mass airflow sensor, or throttle position sensor can fail, leading to poor engine performance and triggering the check engine light.

Over time, seals and gaskets can wear out, leading to oil leaks. This is common in older engines like the 1992 GEO Metro.

If not replaced at recommended intervals, the timing belt can break, causing severe engine damage.

Problems with spark plugs, ignition wires, or the distributor can lead to misfires and poor engine performance.

Inadequate cooling system maintenance can lead to overheating, which can damage the engine.

Clogged fuel injectors or a failing fuel pump can cause poor fuel delivery, affecting engine performance.

The exhaust manifold can crack over time due to heat cycles, leading to exhaust leaks and reduced engine efficiency.

Worn or damaged vacuum hoses can cause a variety of performance issues, including rough idling and stalling.

The 1991 GEO Metro with a 3-cylinder Suzuki engine is known for developing oil leaks over time, often due to worn gaskets and seals.

This model can experience overheating issues, often caused by a failing thermostat, clogged radiator, or coolant leaks.

The timing belt may wear out or break, leading to engine performance issues or even engine damage if not replaced according to the maintenance schedule.

Aging components such as fuel injectors, oxygen sensors, or a dirty air filter can lead to reduced fuel efficiency.

The exhaust manifold may develop cracks due to the high heat cycles, leading to exhaust leaks and increased engine noise.

The valve cover gasket is prone to leaking oil, which can cause oil to drip onto the engine and other components.

Problems with the distributor, spark plugs, or ignition coils can lead to misfires and poor engine performance.